I would like to give special recognition to Randy Ivener, who diligently combed through the material and provided his expert technical knowledge in reviewing the book. He has also been as good a friend as anyone could hope to have.

Thank you Pete Davis for valuable and relevant editing contributions.

A very big thank-you goes to Brett Bartow for providing an opportunity, being patient, and keeping me on track—always with such great enthusiasm. It has been a great pleasure working with him.

Andrew Cupp also has provided pivotal support to see the book to completion. His incredibly thorough and professional efforts deserve a very big thank-you.

Thank you to the production team for such a professional working relationship. It has been great working with you.

I also want to thank my teammates and management at Cisco for providing much needed support and insightful comments to help round up the subject matter, as well as for helping with business analysis tools calculations.

Last, but not least, I would like to thank my friends and family for providing support throughout this project, and a special thank-you to Therese for her loving support.